IBM System x3550 M4 Installation And Service Manual page 260

Replacing a memory module:
Use this information to install a memory module.
About this task
To install a memory module, complete the following steps:
Procedure
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IBM System x3550 M4 Type 7914: Installation and Service Guide
Table 23. Memory rank sparing mode DIMM population sequence (continued)
Number of DIMMs
Third pair of DIMMs
Fourth pair of DIMMs
Fifth pair of DIMMs
Sixth pair of DIMMs
Seventh pair of DIMMs
Eighth pair of DIMMs
Ninth pair of DIMMs
Tenth pair of DIMMs
Eleventh pair of DIMMs
Twelfth pair of DIMMs
Table note: DIMM connectors 3, 6, 7, 10, 15, 18, 19, and 22 are not used in memory rank
sparing mode when UDIMMs are installed in the server.
1. Read the safety information that begins on "Safety" on page vii and
"Installation guidelines" on page 33.
2. Turn off the server and peripheral devices and disconnect the power cords
and all external cables, if necessary.
3. Remove the cover (see "Removing the cover" on page 36).
4. Remove the air baffle (see "Removing the air baffle" on page 37).
5. Carefully open the retaining clips on each end of the DIMM connector and
remove the DIMM.
Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
Number of installed
microprocessor
1
1
1
1
2
2
2
2
2
2
DIMM connector
8, 9
11, 12
7, 10
3, 6
13, 14
16, 17
20, 21
23, 24
19, 22
15, 18